Pipe-trimming tool.



No. 746,312. PATENTED DEC. s, 1903. L. EMOND.

PIPE TRIMMING TOOL.

APPLICATION FILED AUG. 7, 1902.

N0 MODEL. 2 SHEETS-411E111 1.

No. 746,312. 7 PATENTED DEC. 8, 1903.

L. EMOND. L

- PIPE TRIMMING TOOL.

APPLICATION FILED AUG. 7, 1902.

N0 MODEL. SHBETS-SHEET 2.

" rlllll/m jrzimrzlht z/xa'izeasea) 5mm. I

UNITED STATES Patented December 8, 1903.

LOUIS EMOND, OF LOWELL, MASSACHUSETTS.

PIPE-TRIMMING TOOL.

SPECIFICATION forming part of Letters Patent No. 746,312, dated December8, 1903. Application filed August 7, 1902. Serial No. 118,836. (Nomodel-l To all whom it may concern: 7

Be it known that I, LOUIS EMOND, of Lowell, in the county of Middlesexand State of Massachusetts,haveinvented certain new and usefulImprovements in Pipe-Trim ming Tools, of which the followingis aspecification.

My invention is an improved device for tapering the ends of soft-metalpipes, and is especially adapted to the use of plumbers in the processof uniting the ends of lead pipes by soldering. In so uniting the endsof pipes the usual method is to enlarge one of the ends, as N, Figure 5,to be united by rasping and filing to make the orifice into a trumpetshape, then by scraping or'filing to reduce the end of the other pipe,as M, Fig. 5, to be united with the first until it has assumed theappropriate tapering form to fit into the first-named pipe. Solder isthen applied to and about the joint.

The object of my invention is to simplify the process by providing asuitable tool for quickly and accurately cutting the outside taper. Thetool is also so constructed that it generally prevents the cuttings fromgetting into the pipe, and thus obstructing the faucets, &c. I attainthese results by the mechanism illustrated by the accompanying drawings,in which- Figs. 1, 2, and 3 show studs of dilferent sizes to fit thebores of diiferent pipes. Fig. 4 is a plan View of the tool with a studin place. Fig. 5 shows two pipes fitted to be 1 united by solder orotherwise. Fig. 6 is a sectional view of the shank and cutter on theline X Y of Fig. 4. Fig. 7 shows another form of stud of a triangularshape. Fig. 8 shows another form of handle. Fig. 9 shows the handle ofFig. 8 and the stud integral with the shank. Fig. 10 shows still anotherform of handle. Fig. 11 shows a stud, of to which thesmall end isscrew-threaded at c fit interior threads at of the shank A. Figs. 12,l3, 14, C O C show difierent forms of studs.

The shank A, of anysuitable metal, is provided at one end with anysuitable form of handlejB,adapted to rotate the shank upon its axis, andat its other end it is provided with an orifice a of suitable depth toreceive the small end a of the adjusting-studs O C 0 C The studs 0 O Catthe larger end are of cylindrical form and at this end are made ofdifferent sizes to fit the bores of differentsized pipes. The largercylindrical studs taper slightly, as at 10,10 fit the slant ot' thecutting-blade 'D. other form of stud which may be used to advantage,especially upon jammed pipes, of

which the opening is not a perfect circle. The one shown in Fig. 7 issubstantially triangular with rounded edges; butan oblong, oval, orsquare stud (see Figs. 12, 13, 14)

may be used, if desired, and may be of ad vantage with certain-shapedpipes. All these studs are formed with a squared shoulder Z, which bearsagainst theend'of shank A. The smaller ends 0 of the studs 0 O C C areof a uniform. size to fit'easily the orifice'a in the ,end of shank A.The thumb-screw F probe attached by screws, as shown, so that it may bedetached for the purpose of sharpen- In Fig. 7,0, is shown aning orreplacing by another cutter set at a difierent angle.

The operation is as follows: The small end of a stud of suitable size mmthe bore of the pipe which is to be cut is inserted in orifice a. It isfixed in place by set-screw F, and then the large end is inserted in thebore of the pipe to be tapered. This bringsthe' cutting edge of E D incontact with the outer edge'of the end of the pipe. As' the tool isrotated by means of its handle, the cutter shaves the pipe in a mannersimilar tothe well-known forms of pencil-Sharpeners until the pipe hasassumed the desired taper, when the tool is withdrawn and the pipe isready to unite with a similar pipe, which has been treated to theinternal tapering process. Where possible, it is an advantage to use thecircular studs, as they are sized to fit the bore 7 of the pipesoperated upon quite closely, and

pipe is irregular in end section, a triangular or oval stud is to bepreferred, as it is easier to insert and rounds out the pipe whenrotated. Of course any other style of handle, as B in Figs. Sand 9 or Bin Fig. 10, suitable for turning the shank may be used and the stud maybe attached to the shank in other Ways, as by being screw-threaded atthe small end to fit interior threads in the shank, as c a in Fig. 11,or the shank and stud may be made integral, as A C in Fig. 9; but theform shown in Figs. 1, 2, 3, at, and 6 is preferred.

That I claim as my invention, and desire to cover by Letters Patent, is

1. In a pipe-cutting tool, the combination of a shank, a handle forrotating said shank, a cylindrical stud adapted to fit the bore of apipe, and a cutter firmly attached to said shank and provided with acutting edge set at an oblique angle to the axis of the stud andextending at an oblique angle to said axis whereby when said tool isrotated an outside bevel will be out upon the end of said pipe.

2. In a pipe-cutting tool, the combination of a shank, a stud adapted tobe inserted in the bore of a pipe, a cutter firmly attached to saidshank and provided with a cutting edge set at an oblique angle to theaxis of the stud, and means for rotating said shank and cutter about theaxis of said pipe, whereby an outside bevel may be cut on the end ofsaid pipe.

3. In a pipe-cutting tool, the combination of a shank provided with asuitable orifice at one end, a handle at the opposite end of said shank,a detachable stud adapted at one end to be inserted in the bore of apipe, and at the other end to fit in the orifice of said shank, athumb-screw adapted to project into the orifice in the shank and to fitinto an annular recess in the smaller portion of the stud, and a cutterattached by screws to the end of the shank, so that its cutting edgewill rest at an oblique angle to the axis of said detachable stud.

4. In a pipe-cutting tool, the combination of a shank adapted to beinserted in the bore of a pipe, means for rotating said shank, and acutter attached to said shank and set at an oblique angle to the axisthereof whereby an outside bevel may be cut on the end of said pipe.

5. In a pipe-cutting tool,a shank provided with an orifice in one end, ahandle attached to the opposite end of said shank, an oblique cutterattached to said shank and projecting beyond the orifice therein,combined with a cylindrical stud of suitable size at one end to fit thebore of a pipe, tapered slightly to conform to the edge of said cutter,provided with shoulder to set against the end of said shank, and reducedto fit the orifice in the shank, and a thumb-screw adapted to projectinto said orifice and into an annular recess in said stud as described.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

LOUIS EMOND.

Witnesses:

WALTER F. LEIGHTON, FANNIE A. ADAMS.

